Fuel valve of internal combustion engines



May 12, 1931.

FUE

ERNAL COMBUSTIO i i i lill ml "mV/@f W. s. BURN N ENGINES Sheets-Sheet 1 May 12, v1931.

W. S. BURN FUEL VALVE OF INTERNAL COMUSTION ENGINES Filed April 16, 1928 2 sheets-sheet 2 Patented ll/liay l2, lli

UNIT@ WALTnn scoTT BURN, or HARTLEPooL, ENGLAND FUEL VALVE OF INTERNALCOMBUSTION ENGIE-S Application led Apri1`16, 1928, Serial No. 270,527, and in Great Britain December 19, 1927.

rIhis invention relates to the fuel valves of internal combustion engines and has for its object to provide means for maintaining the fuel valves and nozzles cool without di- 5 rectly introducing cooling water to the valve i body and nozzle. Y

A further object is to secure more eiiicient cooling of the fuelinjection nozzle proper than has hitherto been possible whereby carbonization and calring of the fuel on the nozzle is substantially prevented.

In accordance with the invention 'a sleeve greater portion of the sleeve. This pocket is" `open to the cooling water circulation of the cyinder head or other part carrying the fuel valves and the arrangement is such that the cooling water passes through the annular space aforesaid surrounding the sleeve and passes thence to the water outlet. y

In the accompanying drawings, Fig. 1 is a-sectional view of part of a cylinder head and aefuel valve protected in accordance with the invention. Fig. 2 shows one arangement according to the invention and Fig. 3 is a horizontal section through Fig. 2.

According to this arrangement two' fuel injection valves l are employed arranged diametrically opposite each other within a casing 2 having four equidistantly spaced inlet passages 3 connected to the main engine coolingwater system. The whole of that part of the apparatus, generically designated herein by the numeral l,

40 is protected by a sleeve 4, the lower end of the nozzle 5 alone protruding through the inner end thereof, and this sleeve 4 is arranged in a pocket 6 formed by the apron 7 which eX- tends nearly to the bottom of the casing 2.

The outlet from this pocket is shown at 8, there being two outlets to correspond to the two valves employed. l

The cooling water entering the cylinder head, i. e. the so-called casing 2, passes around .50 the lower end of the sleeve 4 and up through which extends into the casing water the annular passage or pocket 6 tothe when outlet,this taking place at each valve, more than one is employed.

The sleeve 4 may be fins 4* and be seated against packing 8a bythe pressure upon a gland 9 so as to secure water-tightness.

l'lhe foregoing arrangement ensures effi-4 cient cooling of the fuel valve end and by providing cool surfaces round the nozzle end the arrangement will be found to prevent or minimize the formation of carbon about the nozzle orifices.

In the particular embodiment of the invention illustrated the sleeve 4 has a` protecting end l0 with an aperture just largeA enough to allow the inner en d of the nozzle 5 to protrude. A

What I claim is l. In an internal combustion engine having a `water cooled cylinder head and a fuel nozzle substantially enclosed in a heat conducting sleeve penetrating the water`spacc and the outer and inner 4walls of said cylinder head, means for promoting over the exterior surface of the fuel valve containing sleeve a flow of cooling water at a velocity higher than that normally obtaining in the' main water space of the cylinder head.

2. In an internal combustion engine having a water cooled cylinder head and .a fuel nozzle substantially enclosed in a heat conformed with annulaif ducting sleeve penetrating the water space j and the outer and inner walls of said cylinder head, a pocket like water chamber formed within the main water space of the cylinder head by a wall embracing and spaced from the fuel valve containing sleeve, said pocketlilre chamber having a water inlet in the vicinity of the nozzle encasing end of the sleeve land a water outlet adjacent the opposite end thereof.

3. In .an internal combustion engine having a water cooled cylinder head and a fuel nozzle substantially enclosed in a heat conducting sleeve penetrating the water space and the outer and inner walls of said cylinder head, a separate annular water chamber formed around said sleeve by a partition wall extending from the outer wall of the cylinder '1 head into the main Water space thereof, a water passage from the main water space into the separate annular Water space, said, passage being located to ldirect water lirst on to the nozzle encasing part of the removable sleeve, .a water inlet to the main water space and a Water outlet from that part of the separate annular chamber most remote from the fuel nozzle 4. An assembly according to claim 3, Wherein that end of the removable sleeve which encases the fuel nozzle and which is first contacted by cooling Water is furnished with external heat dissipating fins.

5. ln an internal combustion engine with a cylinder head having an Outer and an inner Wall, a main Water space therebetween and a plurality of fuel inlet valves with nozzle, each housed in a heat conducting removable sleeve penetrating both the water space and inner and the outer Walls of said cylinder head, a plurality of water passages extending radially into the water space, a plurality of apron-like walls extending from the outer wall of said cylinder head into the Water space and disposed so as severally to provide auxiliary annular water spaces around the sleeves, water transfer passages between the inner edges of the apron-like Walls and the'inner Wall of the cylinder head and Water outlet passage from those ends of the Vauxiliary annular water spaces which fall adjacent the outery wall of the cylinder head.

In an internal combustion engine with a cylinder head having an inner and an outer wall, a main Water space therebetween, and a plurality of fuel inlet valves and nozzles, each housed in a heat conducting removable sleeve penetrating both the water space and the inner and outer Walls of the cylinder head, a plurality of radially disposed Water inlet passages to said water space, a plurality of apron-like partition walls embracing .said sleeves and spaced therefrom to provide annular auxiliary water spaces therearound, and Water outlet passages extending severally from the said auxiliary Water spaces, said apron-lil e partition walls being formed integrally with the outer wall of the cylinder 'naad and with the inner circumferential wall thereof but being spaced from the inner Wall thereof by water transfer passages located substantially in alignment with the nozzle encasing regions of the several heat conducting sleeves.

7. In an internal combustion engine including a cylinder head having va cooling water chamber between its inner and outer walls, 11nd a fuel injection valve and nozzle housed in said cylinder head within a heat conducting sleeve extending` through the inner and outer Walls and water space of the cylinder head, means for directing cooling Water first 0n to the nozzle encasing part of the 

